code: def __init__(self, vit: ViT, masking_ratio):
      super().__init__()
      self.vit = vit
  
      assert (
          masking_ratio > 0 and masking_ratio < 1
      ), "masking ratio must be kept between 0 and 1"
      self.masking_ratio = masking_ratio
  
      dim = vit.dim
      self.mlp_head = nn.Sequential(
          nn.LayerNorm(dim), nn.Linear(dim, vit.num_patches)
      )
  
imports: import torch
  from torch import nn, einsum
  import torch.nn.functional
  from einops import rearrange, repeat
  from einops.layers.torch import Rearrange
label_desc: Use image node_id 1 to create a new MP3 object from inherited base classes: nn with example: obj = MP3(vit, masking_ratio)